Mastermind and the road to Damascus

[Roland Perry]

In article <49A2D3F2.5123.B9C2AE0@davidh.spidacom.co.uk>, David Hansen 
<davidh@spidacom.co.uk> writes
>> Won't the policeman be deciding if the photo is potentially "information
>> of a kind likely to be useful to a person committing or preparing an act
>> of terrorism", and as a result arrest the photographer.
>>
>> When it gets to court,
>
>Most unlikely. That isn't what the police bod wants.

In that case, how can they stop anyone taking photos (other than by 
bluffing)?
-- 
Roland Perry
Brown suede shoes at the ready